1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35a8db1368fe68f934af7e3b0316a7258cf7802eac19c50000565a2cc383402. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/128f5f70-9036-4a05-a7f0-b7ee27515642.json and https://artists.proofprofile.net/proofs/artist/128f5f70-9036-4a05-a7f0-b7ee27515642.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b736ebe392015e25fd22ba6f88f9d3c7fe6967de84973f8b55d921f116669b9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1930725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ea7a2bc2a9acdcb5aa24238d579ee33738bd8371f944cf1d36e584299015f7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452079332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c51118896ece2c2db6235dcaf2445557e671ac498c9846e0e1b369971539a7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202143224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86381a257357306a8b2d4f817e1fe91de4a0699665f0ad3c1b7c05de3360b34b. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202160916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b687a4031803f5c3430c1cc33dee8fa62a0e667969e96ad5868aea6e11e2fb3. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA072168678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb6448e66e456e6449b630ad46fb9cdb6e2f0844f5d27e003ff112a2a64e47f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2334787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21b52227f1675cb0ae250b70e758ef8e05a2f8a3ac4aa5caab281c94e59a50d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R2334788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498be051d26d6250e4627f18b82bd03273de0a3440bef13b7d04dc79d7e3eca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUAGV2301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fca7099def9f102df43fbcbd1d60c365d386507a48d3d376a811ecd0d4bdd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0P2387801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294bc2bedfd1d27e8fcfed06b0212d4efd7bd802bb6ae2c3e0c51c8987659b0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762401664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacff96156250a22401c39958905aaddf1d2420fcb8769a4ce45cb8b4df344515. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762401673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676c3055eb9192ae63a720ae200c8969d6151d12b35c42730a5298e98a29620d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA072458485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695808f9a91a7cc74f41a6b7f64ca11ff085b740552c50398a8fc5cfc55fe630. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA092420241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d09ed90c146334df6ba01d65f73aa15eb5d485edfa575f0f779093d49f930. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X42512875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc72552adf8919a815509b2ad57713f9a1fcbd765d811a559f7e8296a3f4002. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9044bf6094367e6ce4a0563d543d3929a61632560bd27cae8784924dc75030b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa30b7232b12963681190ce47973535aa14e438fa8fc6dca696cfb10b0b72ff. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e5ed8358f3d8941713a635bce922b50940982e049bf06759879388e5a0e647. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5218716f3089769867bd4802d1023b7a81b6252bb728f0af37aab2d5a7ede5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1159619213415b45060d7c1fd2c7158b32f59e26c8c06e06c63e218fa073d0a3. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af22e41f4ea044f8fe411e77f4b85f590ceea3bedc5e1f36fc840becd52e95a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15235dd2f6fdba2d2e8d73f1ef907dcb68b3a9f14fc9f5e7df59c49123ff48b7. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24df27f7e0f425b5a361617c27bd6038acd0368c073194ebafb202c3742e4bf1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0L2449973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728b47b735a5cf8629ef0efe972f29cfe4509644525a0da0ffca9f903070e0c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9763f0762316ae88dfb12b76ea02cdc3e2f3ebb2c05ff793ffc430ade5ec91b7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX202529049.